8
serial
number
1# sensor
grade
2# sensor
grade
Corresponding function
1
+E1
+E2
Positive excitation voltage (positive
supply bridge)
2
+F1
+F2
Feedback
voltage
positive
(4-wire
connection method and arch bridge
positive short circuit)
3
-S1
-S2
Output signal negative
4
+S1
+S2
Output signal positive
5
-F1
-F2
Negative
feedback
voltage
(4-wire
connection method and negative short
circuit of arch bridge)
6
-E1
-E2
Negative excitation voltage (negative
supply bridge)
7
SHD
SHD
Shielding end
Table 4.1 Label and function of load cell interface
4.5.2 6-wire connection method of load cell
In order to increase the stability of the weighing signal at a long distance,
the instrument and the sensor can be connected with a 6-wire system (long-line
compensation mode), and the sensor should adopt a 6-core shielded wire, and it
should be wired separately from the lines with strong interference (power equipment
wiring, etc.) and AC lines. (see figure 4.8 below)
4.5.3 Four-wire connection method of load cell
If the distance is close, 4-wire connection method can be adopted. At this
time, "E+" and "F+", "E-" and "F-" must be shorted on the interface terminals of
the host sensor respectively. If it is not short-circuited, the instrument will
not work normally, even sometimes it seems to work normally on the surface, but
it will actually produce a big error, so it must be connected strictly according
to Figure 4.9.
Figure 4.8 6-wire connection method of load cell Figure 4.9 4-wire connection